CN201355522Y - Voice prompt system for traffic signals - Google Patents
Voice prompt system for traffic signals Download PDFInfo
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- CN201355522Y CN201355522Y CNU2008202380274U CN200820238027U CN201355522Y CN 201355522 Y CN201355522 Y CN 201355522Y CN U2008202380274 U CNU2008202380274 U CN U2008202380274U CN 200820238027 U CN200820238027 U CN 200820238027U CN 201355522 Y CN201355522 Y CN 201355522Y
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Abstract
The utility model relates to a voice prompt system for traffic signals, which comprises a power circuit, a voltage stabilizing circuit, a voice circuit, an audio amplification circuit, a clock module, a clock function setting switch and a clock control circuit. The signal output end of the voice circuit is connected with the voice signal input end of the audio amplification circuit; the control signal input end of the audio amplification circuit is connected with the control signal output end of the clock control circuit; the control signal input end of the clock control circuit is connected with the control signal output end of the clock circuit; the clock signal output end of the clock circuit is connected with the signal input end of the clock function setting switch; and the signal output end of the audio amplification circuit is connected with a post audio device as the output of the voice prompt system for traffic signals. The utility model has the voice prompt function, has the advantages of safety and reliability, and reduces the unexpected accidents.
Description
Technical field
The utility model relates to a kind of walkway traffic lights speech prompting system, but especially a kind of speech prompting system of time control, specifically a kind of traffic signals speech prompting system.
Background technology
Present traffic signals prompt system adopts traffic lights, and it is made up of red light, green light, amber light.Red represents danger, no through traffic, when red light is bright, inaccurate vehicle, walk; Yellow is represented vigilance, when amber light is bright, and inaccurate vehicle, walk, but the pedestrian who has crossed the vehicle of stop line and entered crossing can continue to pass through; Green is represented safety, when green light is bright, permits vehicle, walk.Existing traffic lights Presentation Function is fairly perfect, but poor in greasy weather or air quality, the light of green light and amber light is easy to scattering under the situation of road surface low visibility, is not easy to see or do not see Chu, very easily cause the generation of traffic hazard, influenced civic safety trip.And, when having physical disabilities with visual disabilities to go out to go across the road outside, because eyes be cannot see and very easily caused traffic hazard, the crossing that has arranges have the assistant policeman to lead the way to the blind person, but most of crossings all do not have the assistant policeman, if arrange the assistant policeman also can cause waste of manpower resource on a large scale, increased the expense of traffic department, traffic lights voice suggestion simultaneously also has more hommization.Therefore, existing traffic signals prompt system does not have safe prompt facility under the situation of low visibility, can not give the blind person with safety guarantee, can not satisfy the use needs of existing transit equipment.
Summary of the invention
The purpose of this utility model is only to have the demonstration alarm function at existing traffic signals prompt system, can not under the situation of low visibility, give safety instruction, can not give the problem of blind person, propose a kind of traffic signals speech prompting system of setting prompt time, having sound prompt function with prompting.
The technical solution of the utility model is:
Traffic signals speech prompting system of the present utility model, it is characterized in that it comprises sound circuit, audio amplifier circuit, clock module, time clock feature is provided with switch and clock control circuit, the signal output part that time clock feature is provided with circuit links to each other with the signal input part of clock circuit, the control signal output ends of clock circuit links to each other with the signal input part of clock control circuit, the signal output part of clock control circuit links to each other with the signal input end of sound circuit or audio amplifier circuit, the voice signal output terminal of sound circuit links to each other with the voice signal input end of audio amplifier circuit, and the signal output part of audio amplifier circuit connects back level stereo set as the output of traffic signals speech prompting system.
Traffic signals speech prompting system of the present utility model, it is characterized in that it provides working power by power circuit, the voltage source signal of red light 220V is by the power supply signal input end of transformer as the traffic signals speech prompting system, the direct voltage source of another power supply signal input termination green light 15V of traffic signals speech prompting system, power circuit comprises the rectification circuit that is made of diode D4-D7, by resistance R 15, R16, capacitor C 15, the filtering circuit 1 that C16 constitutes, by diode D1, capacitor C 1, filtering circuit 2 and diode D8 that C12 constitutes, the signal output part of power circuit is respectively the traffic signals speech prompting system working power is provided.
Mu balanced circuit of the present utility model comprises by resistance R 12, capacitor C 2, C13, diode D2, the mu balanced circuit 1 that voltage stabilizing chip U3 constitutes, resistance R 11, R13, R14, capacitor C 3, C4, C14, diode D3, the mu balanced circuit 2 that voltage stabilizing chip U4 constitutes, resistance R 17, capacitor C 17, diode D9, the mu balanced circuit 3 that voltage stabilizing chip U5 constitutes and by capacitor C 19, C20, diode D11, the mu balanced circuit 4 that voltage stabilizing chip U6 constitutes, the signal output part of mu balanced circuit 1-3 connects each respective signal input end of sound circuit, and the signal output part of mu balanced circuit 4 connects the voltage regulation signal input end of clock circuit.
Sound circuit of the present utility model comprises speech chip U1, resistance R 1-3, R10, R14, R17 and capacitor C 2, C4, C17, the voltage signal input end of sound circuit links to each other with the signal output part of mu balanced circuit 1-3 respectively, the signal output of mu balanced circuit 1 is the voltage signal input end that the negative electrode of diode D2 connects speech chip U1 correspondence, the signal output of mu balanced circuit 2 is that the negative electrode of diode D3 passes through shunt capacitance C14, resistance R 14 ground connection, the negative electrode of diode D3 connects the corresponding switching signal input end of speech chip U1, the signal output of mu balanced circuit 3 is that the negative electrode of diode D9 passes through shunt capacitance C17, resistance R 17 ground connection, the negative electrode of diode D9 connects the corresponding switching signal input end of speech chip U1, the signal output part of speech chip U1 is by resistance R 3 ground connection, the non-earth terminal of resistance R 3 is connecting resistance R2 respectively, R10, resistance R 2, the other end of R10 connects the voice signal input end of audio amplifier circuit as the signal output part of sound circuit.
Audio amplifier circuit of the present utility model comprises that audio frequency amplifies chip U2, diode D10, capacitor C 5-C11, C18, resistance R 4-R9, R18, the power supply signal input terminating diode D8 of audio amplifier circuit and the negative electrode of D1, the signal input end that audio frequency amplifies chip U2 is that control signal input and the control signal output ends of clock control circuit of audio amplifier circuit is that the collector of triode Q1 links to each other, the collector of triode Q1 and shunt capacitance C18, resistance R 19 links to each other, shunt capacitance C18, the other end of resistance R 19 connects the negative electrode of diode D8 respectively by resistance R 18 ground connection and diode D10, the signal output part of the voice signal input termination sound circuit of audio amplifier circuit is a resistance R 2, the end of R10, resistance R 2, R10 is respectively by capacitor C 10, C11 links to each other with the voice signal input end that audio frequency amplifies chip U2, and the signal output part of audio frequency amplification chip U2 is that the signal output part of audio amplifier circuit passes through resistance R 4 respectively, R5, R8, capacitor C 5, C6 and resistance R 6, R7, R9, capacitor C 7, C8 connects back level stereo set.
Clock module of the present utility model comprises clock chip IC1 and rechargeable battery, and mu balanced circuit 4 and rechargeable battery provide working power for clock chip IC1.
Time clock feature of the present utility model is provided with switch and comprises touch-switch S1-S7.
Clock control circuit of the present utility model comprises resistance R 20, R21 and triode Q1, the signal input end of clock control circuit is that the base stage of triode Q1 links to each other with the control signal output ends of clock circuit by resistance R 21, the emitter of triode Q1 is by resistance R 20 ground connection, and the collector of triode Q1 links to each other with the signal input end of audio amplifier circuit or sound circuit as the control signal output ends of clock control circuit.
The beneficial effects of the utility model:
1, time clock feature of the present utility model is provided with the start-stop interval time that switch can arbitrarily be set the traffic lights voice suggestion, the shortest 1 minute, the longest 168 hours, avoid the influence of traffic lights voice suggestion at night to citizen's life, the total system good reliability, operating temperature range is wide, and speech sound is loud, soft.
2, the demonstration situation that speech prompting system of the present utility model can the voice suggestion traffic lights provides safety guarantee to the civic trip under the situation of, low visibility poor in air quality, has reduced the generation of mishap.
3, the demonstration situation that speech prompting system of the present utility model can the voice suggestion traffic lights has made things convenient for eyes physical disabilities' trip, and is for disabled person's trip provides safety guarantee, more humane.
4, speech prompting system clock module circuit voltage wide ranges of the present utility model is 1.2-1.60V; Worker's power consumption stream is less than 10 μ A, and power consumption is few; Working temperature is at-30 ℃-+85 ℃, and the wide ranges stability in use is good; Diurnal clock rate is ± 0.5 second in the time of 23 ± 1 ℃, the precision height, and accuracy is good.
Description of drawings
Fig. 1 is one of theory diagram of the present utility model.
Fig. 2 is two of a theory diagram of the present utility model.
Fig. 3 is an electrical schematic diagram of the present utility model.
Fig. 4 is a panel construction synoptic diagram of the present utility model.
Fig. 5 is the loudspeaker synoptic diagram of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Traffic signals speech prompting system of the present utility model, it comprises sound circuit, audio amplifier circuit, clock module, time clock feature is provided with switch and clock control circuit, the output terminal of time clock feature signalization links to each other with the signal input part of clock circuit, the demonstration output termination LCD display of clock circuit, the control signal output ends of clock circuit links to each other with the signal input part of clock control circuit, the signal output part of clock control circuit links to each other with the signal input end of sound circuit or audio amplifier circuit, the voice signal output terminal of sound circuit links to each other with the voice signal input end of audio amplifier circuit, the signal output part of audio amplifier circuit connects back level stereo set as the output of traffic signals speech prompting system, and stereo set can be loudspeaker.
As shown in Figure 3, the utility model provides working power by power circuit, the voltage source signal of red light 220V is by the power supply signal input end of transformer as the traffic signals speech prompting system, the direct voltage source of another power supply signal input termination green light 15V of traffic signals speech prompting system, power circuit comprises the rectification circuit that is made of diode D4-D7 (model can be RL207), by resistance R 15, R16, capacitor C 15, the filtering circuit 1 that C16 constitutes, by diode D1 (model can be RL207), capacitor C 1, filtering circuit 2 and diode D8 (model can be RL207) that C12 constitutes, the signal output part of power circuit is respectively the traffic signals speech prompting system working power is provided.
As shown in Figure 3, mu balanced circuit of the present utility model comprises by resistance R 12, R1, capacitor C 2, C13, diode D2 (model can be IN4148), the mu balanced circuit 1 that voltage stabilizing chip U3 (model can be 78L05) constitutes, resistance R 11, R13, R14, capacitor C 3, C4, C14, diode D3 (model can be IN4148), the mu balanced circuit 2 that voltage stabilizing chip U4 (model can be 78L05) constitutes, resistance R 17, capacitor C 17, diode D9 (model can be IN4148), the mu balanced circuit 3 that voltage stabilizing chip U5 (model can be 78L05) constitutes and by capacitor C 19, C20, diode D11 (model can be 5819), the mu balanced circuit 4 that voltage stabilizing chip U6 (model can be 7318) constitutes, the signal output part of mu balanced circuit 1-3 connects each respective signal input end of sound circuit, and the signal output part of mu balanced circuit 4 connects the voltage regulation signal input end of clock circuit.
As shown in Figure 3, sound circuit of the present utility model comprises speech chip U1 (model can be DIP28-400), resistance R 1-3, R10, R14, R17, capacitor C 2, C4, C17, the voltage signal input end of sound circuit links to each other with the signal output part of mu balanced circuit 1-3 respectively, the signal output of mu balanced circuit 1 is that the negative electrode of diode D2 (model can be IN4148) connects the corresponding voltage signal input end of speech chip U1 (model can be DIP28-400), the signal output of mu balanced circuit 2 (being the switching signal of green light) is that the negative electrode of diode D3 (model can be IN4148) passes through shunt capacitance C14, resistance R 14 ground connection, the negative electrode of diode D3 connects the voltage signal input end of the correspondence of speech chip U1 (model can be DIP28-400), the signal output of mu balanced circuit 3 (being the switching signal of red light) is that the negative electrode of diode D9 passes through shunt capacitance C17, resistance R 17 ground connection, the negative electrode of diode D9 (model can be IN4148) connects the voltage signal input end of the correspondence of speech chip U1 (model can be DIP28-400), the signal output part of speech chip U1 is by resistance R 3 ground connection, the non-earth terminal of resistance R 3 is connecting resistance R2 respectively, R10, resistance R 2, the other end of R10 connects the voice signal input end of audio amplifier circuit as the signal output part of sound circuit.
As shown in Figure 3, audio amplifier circuit of the present utility model comprises that audio frequency amplifies chip U2 (model can be TDA7269), diode D10, capacitor C 5-C11, C18, resistance R 4-R9, R18, the negative electrode of the power supply signal input terminating diode D8 (model can be RL207) of audio amplifier circuit, the signal input end that audio frequency amplifies chip U2 (model can be TDA7269) is that control signal input and the control signal output ends of clock control circuit of audio amplifier circuit is that the collector of triode Q1 (model can be 9041) links to each other, the collector of triode Q1 and shunt capacitance C18, resistance R 19 links to each other, shunt capacitance C18, the other end of resistance R 19 connects the negative electrode of diode D8 respectively by resistance R 18 ground connection and diode D10, form squelch circuit, realize the start-stop of traffic lights sound prompt device by clock control circuit.The signal output part of the voice signal input termination sound circuit of audio amplifier circuit is the end of resistance R 2, R10, resistance R 2, R10 link to each other with the voice signal input end that audio frequency amplifies chip U2 by capacitor C 10, C11 respectively, and the signal output part of audio frequency amplification chip U2 is that the signal output part of audio amplifier circuit connects back level audio frequency apparatus by resistance R 4, R5, R8, capacitor C 5, C6 and resistance R 6, R7, R9, capacitor C 7, C8 respectively.
As shown in Figure 3, clock module of the present utility model comprises clock chip IC1 (model can be CY-D42D) and rechargeable battery (can be the 1.5V rechargeable battery), and mu balanced circuit 4 and rechargeable battery are that clock chip IC1 (model can be CY-D42D) provides working power.Because traffic lights will be turned off at night,, can cause clock to quit work and not remember so there is not electricity to supply with clock module, therefore add the rechargeable battery of a 1.5V, mu balanced circuit provided voltage when daytime, traffic lights were worked, and charged the battery simultaneously, and battery provides voltage in the traffic lights stopping time in the evening.
As shown in Figure 3, time clock feature of the present utility model is provided with switch and comprises touch-switch S1-S7.
As shown in Figure 3, clock control circuit of the present utility model comprises resistance R 20, R21 and triode Q1 (model can be 9014), the signal input end of clock control circuit is that the base stage of triode Q1 (model can be 9014) links to each other with the control signal output ends of clock circuit by resistance R 21, the emitter of triode Q1 (model can be 9014) is by resistance R 20 ground connection, and the collector of triode Q1 links to each other with the signal input end of audio amplifier circuit or sound circuit as the control signal output ends of clock control circuit.
During concrete enforcement:
Embodiment one
As shown in Figure 1, traffic signals speech prompting system of the present utility model, it comprises sound circuit, audio amplifier circuit, clock module, time clock feature is provided with and clock control circuit, time clock feature signalization output terminal links to each other with the signal input part of clock circuit, the demonstration output termination LCD display of clock circuit, the control signal output ends of clock circuit links to each other with the signal input part of clock control circuit, the signal output part of clock control circuit links to each other with the signal input end of audio amplifier circuit, the voice signal output terminal of sound circuit links to each other with the voice signal input end of audio amplifier circuit, the signal output part of audio amplifier circuit connects back level stereo set as the output of traffic signals speech prompting system, and stereo set can be loudspeaker.
Embodiment two
As shown in Figure 2, traffic signals speech prompting system of the present utility model, it comprises sound circuit, audio amplifier circuit, clock module, time clock feature is provided with and clock control circuit, the demonstration output termination LCD display of clock circuit, time clock feature signalization output terminal links to each other with the signal input part of clock circuit, the control signal output ends of clock circuit links to each other with the signal input part of clock control circuit, the signal output part of clock control circuit links to each other with the signal input end of sound circuit, the voice signal output terminal of sound circuit links to each other with the voice signal input end of audio amplifier circuit, the signal output part of audio amplifier circuit connects back level stereo set as the output of traffic signals speech prompting system, and stereo set can be loudspeaker.
When red light of the present utility model was bright, voice suggestion can be " red light is bright, asks the pedestrian to halt, and does not make a dash across the red light ", repeats twice repeatedly, is music then, and information and number of times can adopt arbitrary form as required.When switching to green light then, voice suggestion: " green light is bright, asks the pedestrian to take care, and passes through fast, repeats twice repeatedly, is music then, and information and number of times can adopt arbitrary form as required.
Time clock feature of the present utility model is provided with the start/stop time that switch can arbitrarily be set the traffic lights voice suggestion, time clock feature is provided with switch and is arranged on the host panel, as shown in Figure 4: key, school were divided key, cancellation/resetkey, timing key, are opened/automatic/key when touch-switch S1-S7 was respectively week key, clock key, school.Touch-switch button of the present utility model can be on demand set-up function, displaying contents and display format arbitrarily.
Function control switch with Fig. 3 is an example, when week key S1:LCD display Displaying timer is provided with state, but presses its adjustment week, and adjustment need be pinned the clock key during week simultaneously.
Clock key S2:LCD display Displaying timer is during the time, press it and transfer to and show normal time, when LCD shows normal time, pin it again by week, the time, the branch key can adjust respectively the check and correction clock week, the time, branch.
When key S3:LCD display Displaying timer is provided with state during the school, but press its collating time, during collating time, need pin the clock key simultaneously.
When the school divides key S4:LCD display Displaying timer that state is set, but press its collating time, during adjustment minute, need pin the clock key simultaneously.
Cancellation/resetkey S5: press this key, the temporary transient time-out of certain group timing promptly do not carried out, press it again, continue timer counter, recover time action.
Timing key S6: after pressing, clock enters each group state regularly is set, by week, the time, the branch key makes and respectively organizes switching time.
Open/automatically/crucial S7: this is the output state key, presses this key, makes that triangle appears at the left side on the LCD display, for manual start IN is a normally open; Press this key, make on the LCD display in the middle of triangle appears at, the expression clock is in timing automatic control state AUTO, will regularly open and close the traffic signals speech prompting system according to the time that sets, and presses this key, make on the LCD display triangle appear at the right, for the OFF that manually shuts down is normal off status, at this moment controlled traffic signals speech prompting system is manually closed, and timing controlled can not be carried out, it is middle by this key triangle to be got back to again, and timer is in automatic control state.
The utility model does not relate to the part prior art that maybe can adopt all same as the prior art to be realized.
Claims (8)
1, a kind of traffic signals speech prompting system, it is characterized in that it comprises sound circuit, audio amplifier circuit, clock module, time clock feature is provided with switch and clock control circuit, the signal output part that time clock feature is provided with circuit links to each other with the signal input part of clock circuit, the control signal output ends of clock circuit links to each other with the signal input part of clock control circuit, the signal output part of clock control circuit links to each other with the signal input end of sound circuit or audio amplifier circuit, the voice signal output terminal of sound circuit links to each other with the voice signal input end of audio amplifier circuit, and the signal output part of audio amplifier circuit connects back level stereo set as the output of traffic signals speech prompting system.
2, traffic signals speech prompting system according to claim 1, it is characterized in that it provides working power by power circuit, the voltage source signal of red light 220V is by the power supply signal input end of transformer as the traffic signals speech prompting system, the direct voltage source of another power supply signal input termination green light 15V of traffic signals speech prompting system, power circuit comprises the rectification circuit that is made of diode D4-D7, by resistance R 15, R16, capacitor C 15, the filtering circuit 1 that C16 constitutes, by diode D1, capacitor C 1, filtering circuit 2 and diode D8 that C12 constitutes, the signal output part of power circuit is respectively the traffic signals speech prompting system working power is provided.
3, traffic signals speech prompting system according to claim 1, it is characterized in that described mu balanced circuit comprises by resistance R 12, capacitor C 2, C13, diode D2, the mu balanced circuit 1 that voltage stabilizing chip U3 constitutes, resistance R 11, R13, R14, capacitor C 3, C4, C14, diode D3, the mu balanced circuit 2 that voltage stabilizing chip U4 constitutes, resistance R 17, capacitor C 17, diode D9, the mu balanced circuit 3 that voltage stabilizing chip U5 constitutes and by capacitor C 19, C20, diode D11, the mu balanced circuit 4 that voltage stabilizing chip U6 constitutes, the signal output part of mu balanced circuit 1-3 connects each respective signal input end of sound circuit, and the signal output part of mu balanced circuit 4 connects the voltage regulation signal input end of clock circuit.
4, traffic signals speech prompting system according to claim 1, it is characterized in that described sound circuit comprises speech chip U1, resistance R 1-3, R10, R14, R17 and capacitor C 2, C4, C17, the voltage signal input end of sound circuit links to each other with the signal output part of mu balanced circuit 1-3 respectively, the signal output of mu balanced circuit 1 is the voltage signal input end that the negative electrode of diode D2 connects speech chip U1 correspondence, the signal output of mu balanced circuit 2 is that the negative electrode of diode D3 passes through shunt capacitance C14, resistance R 14 ground connection, the negative electrode of diode D3 connects the corresponding switching signal input end of speech chip U1, the signal output of mu balanced circuit 3 is that the negative electrode of diode D9 passes through shunt capacitance C17, resistance R 17 ground connection, the negative electrode of diode D9 connects the corresponding switching signal input end of speech chip U1, the signal output part of speech chip U1 is by resistance R 3 ground connection, the non-earth terminal of resistance R 3 is connecting resistance R2 respectively, R10, resistance R 2, the other end of R10 connects the voice signal input end of audio amplifier circuit as the signal output part of sound circuit.
5, traffic signals speech prompting system according to claim 1, it is characterized in that described audio amplifier circuit comprises that audio frequency amplifies chip U2, diode D10, capacitor C 5-C11, C18, resistance R 4-R9, R18, the power supply signal input terminating diode D8 of audio amplifier circuit and the negative electrode of D1, the signal input end that audio frequency amplifies chip U2 is that control signal input and the control signal output ends of clock control circuit of audio amplifier circuit is that the collector of triode Q1 links to each other, the collector of triode Q1 and shunt capacitance C18, resistance R 19 links to each other, shunt capacitance C18, the other end of resistance R 19 connects the negative electrode of diode D8 respectively by resistance R 18 ground connection and diode D10, the signal output part of the voice signal input termination sound circuit of audio amplifier circuit is a resistance R 2, the end of R10, resistance R 2, R10 is respectively by capacitor C 10, C11 links to each other with the voice signal input end that audio frequency amplifies chip U2, and the signal output part of audio frequency amplification chip U2 is that the signal output part of audio amplifier circuit passes through resistance R 4 respectively, R5, R8, capacitor C 5, C6 and resistance R 6, R7, R9, capacitor C 7, C8 connects back level stereo set.
6, traffic signals speech prompting system according to claim 1 is characterized in that described clock module comprises clock chip IC1 and rechargeable battery, and mu balanced circuit 4 and rechargeable battery provide working power for clock chip IC1.
7, traffic signals speech prompting system according to claim 1 is characterized in that described time clock feature is provided with switch and comprises touch-switch S1-S7.
8, traffic signals speech prompting system according to claim 1, it is characterized in that described clock control circuit comprises resistance R 20, R21 and triode Q1, the signal input end of clock control circuit is that the base stage of triode Q1 links to each other with the control signal output ends of clock circuit by resistance R 21, the emitter of triode Q1 is by resistance R 20 ground connection, and the collector of triode Q1 links to each other with the signal input end of audio amplifier circuit or sound circuit as the control signal output ends of clock control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202380274U CN201355522Y (en) | 2008-12-26 | 2008-12-26 | Voice prompt system for traffic signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202380274U CN201355522Y (en) | 2008-12-26 | 2008-12-26 | Voice prompt system for traffic signals |
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| Publication Number | Publication Date |
|---|---|
| CN201355522Y true CN201355522Y (en) | 2009-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008202380274U Expired - Fee Related CN201355522Y (en) | 2008-12-26 | 2008-12-26 | Voice prompt system for traffic signals |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102194319A (en) * | 2011-03-17 | 2011-09-21 | 生茂光电科技股份有限公司 | Circuit of blind people prompter |
| CN103956056A (en) * | 2014-05-16 | 2014-07-30 | 保定维特瑞交通设施工程有限责任公司 | Wireless traffic signal control system |
-
2008
- 2008-12-26 CN CNU2008202380274U patent/CN201355522Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102194319A (en) * | 2011-03-17 | 2011-09-21 | 生茂光电科技股份有限公司 | Circuit of blind people prompter |
| CN103956056A (en) * | 2014-05-16 | 2014-07-30 | 保定维特瑞交通设施工程有限责任公司 | Wireless traffic signal control system |
| CN103956056B (en) * | 2014-05-16 | 2016-06-01 | 保定维特瑞交通设施工程有限责任公司 | Traffic signal wireless control system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20101226 |